Day sequel is Penguin's top e-book weekly sale

An erotic novel has become Penguin's most successful ever e-book in terms of weekly sales, selling 75,000 copies in pre-orders alone, according to the publisher.

Reflected in You, which is published today (Tuesday October 2nd) in e-book form, is the follow-up to Sylvia Day's Bared to You, which is currently riding high in bestseller charts across the world.

A spokesman for Penguin said: "Digital pre-orders of Reflected in You have been phenomenal. Sylvia Day's second installment has been at the top of the digital pre-order charts for several weeks ahead of its release tomorrow."

They added: "The third installment, Entwined with You, is also already gathering major momentum. The reception to the series has delighted us and is a thought-provoking example of tactical publishing which Penguin will continue to develop into 2013."

The books form part of the Crossfire series, which has been sold to 34 territories internationally.